Pop-up screen showing THIS COMPUTER IS BEING ATTACKED problem

Hello my friends! I was searching for solutions and found your forum so amazing, like all of you are trying to finds ways in fixing some real problem. In my office, one computer unit is being attacked by the pop-up topic above. hope we could find solution for this one! Thank you very much

Run both ATF and Malwarebytes
http://forums.whatthetech.com/Before_Posti…elp_t57813.html